HP Hitachi Dynamic Link Manager Software - Manual (Page 157)

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If HDLM is uninstalled in one of the following situations, the persistent
reservation in the LU will remain:
- When MSCS or VCS is running
- When a cable is not connected to the host
To uninstall HDLM, follow the procedure in
Uninstallation Procedures -
MSCS or VCS Environment on page 3-86 in Uninstalling HDLM on page
3-84 .
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You can execute this utility if the following conditions are satisfied:
- HDLM has been uninstalled.
- The services and drivers in the cluster system are not running.
Creating an HDLM Environment
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Hitachi Dynamic Link Manager User Guide (for Windows(R))